On 10/08/2009 06:22 PM, Joerg Roedel wrote:> On Thu, Oct 08, 2009 at 06:12:28PM +0200, Avi Kivity wrote:> >> On 10/08/2009 12:03 PM, Joerg Roedel wrote:>> >>> From: Alexander Graf<agraf@suse.de>>>>>>> If event_inj is valid on a #vmexit the host CPU would write>>> the contents to exit_int_info, so the hypervisor knows that>>> the event wasn't injected.>>>>>> We don't do this in nested SVM by now which is a bug and>>> fixed by this patch.>>> >> We need to start thinking about regression tests for these bugs. It>> would be relatively easy to set up something with save->cr3 == cr3>> (i.e. no isolation, mmu virtualization, etc.).>> > Should be doable with a in-kernel regression test-suite module, I think.> Triggering such (race-condition like) test cases from userspace is> somewhat hard.>>

Isn't it sufficient, for this case, to inject a nested interrupt when the nested idt is not mapped?